75186070 ÷ 666 
The aim is to understand the frequency of 666 in 75186070.

Moving on to step 1:
The number 666 fits into 7 0 times, leaving a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Include the next digit (5) from the dividend after 7, then repeat: 75 / 666

On to step 2:
75 divided by 666 is 0 with a remainder of 75.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 75 leaves us with 75.
Fetch the next digit (1) from the dividend, attach it to 75 and continue: 751 / 666

Moving on to step 3:
When dividing 751 by 666, we get 1 with a remainder of 85.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 666 from 751 to get 85.
Append the next digit (8) from the dividend to 85 and continue with: 858 / 666

Going ahead to step 4:
666 can be fit into 858 1 times, resulting in a remainder of 192.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
Subtract 666 from 858 to get 192.
Bring next digit (6) of the dividend behind the 192 and repeat the process: 1926 / 666

Let's proceed to step 5:
666 goes into 1926 2 times with a remainder of 594.
Use 2 as the next digit of our solution. 
Result so far: 112.0
Subtract 1332 from 1926 to get 594.
Append the next digit (0) from the dividend to 594 and continue with: 5940 / 666

Step 6:
The number 666 fits into 5940 8 times, leaving a remainder of 612.
Record the quotient 8 as the next digit in the result. 
Result so far: 1128.0
If we take 5328 away from 5940, we end up with 612.
Include the next digit (7) from the dividend after 612, then repeat: 6127 / 666

Let's proceed to step 7:
The number 666 fits into 6127 9 times, leaving a remainder of 133.
Record the quotient 9 as the next digit in the result. 
Result so far: 11289.0
Deduct 5994 from 6127 and we're left with 133.
Grab the next digit (0) from the dividend, add it to 133, then carry on: 1330 / 666

Advancing to step 8:
666 goes into 1330 1 times with a remainder of 664.
The number 1 becomes the next digit in our result. 
Result so far: 112891.0
Deduct 666 from 1330 and we're left with 664.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6640, and continue the process.

Step 9:
The number 666 fits into 6640 9 times, leaving a remainder of 646.
Use 9 as the next digit of our solution. 
Result so far: 112891.9
The remainder is 646 after subtracting 5994 from 6640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6460, and continue the process.

On to step 10:
When dividing 6460 by 666, we get 9 with a remainder of 466.
Record the quotient 9 as the next digit in the result. 
Result so far: 112891.99
Deduct 5994 from 6460 and we're left with 466.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4660, and continue the process.

The final result is 112891.99 with a remainder of 0.466.